Abstract: A purification device (1), for the purification of a liquid-crystal mixture, has a flow chamber (2) which has an inlet opening (3) and an outlet opening (4), arranged opposite the inlet opening, in order to be able to introduce the liquid-crystal mixture into the flow chamber (2) and discharge it from the latter, and at least one flow distribution element (5) which is arranged in the flow chamber (2) in the region of the inlet opening (3), and at least one filter element (6) which is arranged in the region of the outlet opening (4), where a length of the flow chamber (2) measured in the flow direction is at least a factor of 2 greater than a greatest internal dimension of the flow chamber (2) transverse to the flow direction.

Abstract: A purification device (1), for the purification of a liquid-crystal mixture, has a flow chamber (2) which has an inlet opening (3) and an outlet opening (4), arranged opposite the inlet opening, in order to be able to introduce the liquid-crystal mixture into the flow chamber (2) and discharge it from the latter, and at least one flow distribution element (5) which is arranged in the flow chamber (2) in the region of the inlet opening (3), and at least one filter element (6) which is arranged in the region of the outlet opening (4), where a length of the flow chamber (2) measured in the flow direction is at least a factor of 2 greater than a greatest internal dimension of the flow chamber (2) transverse to the flow direction.

Abstract: The invention relates to cover slips coated with covering medium for covering specimens and to machine processes for the production thereof. The cover slips according to the invention greatly simplify the covering of specimens since firstly there is no need to handle the tacky covering medium and secondly the specimens are permanently covered after just a few minutes and can be investigated under a microscope even using immersion objectives. The covering medium layer thicknesses and layer-thickness tolerances according to the invention produce stable and durable covering.

Abstract: A micro mixer for liquid, viscous or gaseous phases with two adjacent housing parts (1,2) disposed on a parting plane (3). Capillary tubes (7) forming line connections are inserted into cross holes (6) in the top part of the housing (1) by welding, for instance, and run into the parting plane (3). The other free ends of the capillary tubes (7) are bent apart and respectively bear a screw connection.

Abstract: The inventive micromixer for mixing liquid, viscous or gaseous phases has a housing bottom part (2) and a housing top part (3) which lie closely against each other via connecting surfaces (6, 7). Two delivery channels (1a, 1b) and an outlet channel (5) open out into the dividing surface between the two connecting surface (6, 7). Channel grooves (9, 10) which cross each other several times are formed in one connecting surfaces (6) and provide a mixing section for the phases being mixed.